. >> plenty to tweet about, including pope benedict's stunning decision to step down. two longtime vatican watchers join us with details. >>> and later, as terrifying a view as you ever want to see. take a look at this video. we'll take you where a string of tornado hit, show you the damage they did. >>> and again, we're expkting the chicago police to make a statement short ly in the case f two suspects in custody. we'll be right back. [ kitt ] you know what's impressive? a talking car. but i'll tell you what impresses me. a talking train. this ge locomotive can tell you exactly where it is, what it's carrying, while using less fuel. delivering whatever the world needs, when it needs it. ♪ after all, what's the point of talking if you don't have something important to say? ♪ i took something for my sinuses, but i still have this cough. [ male announcer ] a lot of sinus products don't treat cough. they don't? [ male announcer ] nope, but alka seltzer plus severe sinus does it treats your worst sinus symptoms, plus that annoying cough. [ breathes deeply ] ♪ oh, wha